Wake Island (1942) [Soldier in meal queue]: Killed (off-screen) against the Japanese forces on Wake Island.

Walk the Dark Street (1956) [Frank Garrick]: Dies of a heart attack.

The Big Country (1958) [Buck Hannassey]: Shot in the chest by his father (Burl Ives), after Chuck unsuccessfully tries to kill Gregory Peck by firing the signal during a duel; he dies in Burl's arms shortly afterwards. (Thanks to Nancy and Jeffrey)

Matt Houston: Get Houston (1983) [Castanos] Dives out of a high window while trying to escape from the police (off screen). We learn of it when Pamela Hensley tells Lee Horsley, after she receives the news in a phone call.

Werewolf: The Black Ship (1987) [Janos Skorzeny]: Killed in a struggle with John J. York while both of them are in their werewolf forms. (Thanks to PortsGuy)